206 research outputs found
I Pronostici di Domenico Maria da Novara
No full textNegli approfonditi studi che si sono susseguiti nel corso dei secoli sull’opera di Copernico e nelle ampie discussioni che questi studi hanno sollevato, molti si sono occupati di colui che fu il suo professore di astronomia nello Studium universitario di Bologna, il Magister Dominicus Maria Ferrariensis de Novaria, Doctor in almo ac inclyto Studio Bononiesi, come egli stesso usava firmarsi.
Gli unici scritti noti del Novara sono i Pronostici astronomico-astrologici che egli redigeva ogni anno, come gli imponeva il suo contratto da professore di astronomia con lo Studio bolognese. Del totale di una quarantina di Pronostici che egli avrebbe dovuto redigere, per ognuno degli anni del suo insegnamento, in volgare e in latino, alla metà degli anni Cinquanta del Novecento se ne conoscevano appena nove e già alla fine del XVI secolo Giovanni Antonio Magini, anch’egli professore di astronomia a Bologna, lamentava la difficoltà di reperirli.
Una ricerca avviata alcuni anni or sono ci ha consentito di ritrovare trentadue Pronostici del Novara, distribuiti in varie biblioteche in Europa e negli Stati Uniti, che coprono il periodo dal 1484, primo anno del suo insegnamento a Bologna, al 1504, anno della sua morte.
Questo lavoro ha lo scopo di rendere disponibile per la prima volta alla comunità degli studiosi un’analisi sistematica dei Pronostici sinora conosciuti.
Fabrizio Bònoli presenta la figura del Novara e dell’ambiente nel quale visse.
Giuseppe Bezza ha eseguito un’analisi del contenuto astrologico dei Pronostici, nel quadro delle conoscenze del tempo.
Salvo De Meis ha analizzato i fenomeni astronomici menzionati dal Novara, in particolare per la loro precisione, comparata a quella degli astronomi suoi contemporanei
Cinzia Colavita e Fabrizio Bònoli hanno redatto la trascrizione dei testi originali dei Pronostici.
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In the in-depth studies conducted over the centuries on the work of Copernicus and the far-reaching discussions these studies have generated, many scholars have investigated his astronomy professor at the Studium of Bologna, Magister Dominicus Maria Ferrariensis de Novaria, Doctor in almo ac inclyto Studio Bononiesi, as he would customarily sign his name.
Novara’s only known writings are the astronomical-astrological Pronostici he drew up every year, as stipulated by his contract as professor of astronomy at the university. Although he must have written about forty Pronostici – one for each year he taught there – in the vernacular and in Latin, in the mid-1950s only nine of them were known and, indeed, as far back as the late sixteenth century Giovanni Antonio Magini, likewise professor of astronomy in Bologna, reported how difficult it was to find them.
The research we undertook several years ago has allowed us to trace thirty-two of Novara’s Pronostici, distributed in various libraries in Europe and the United States; they span the period between 1484, the first year he taught in Bologna, and 1504, the year he died.
The aim of this work is to provide the academic community with a systematic analysis of the known Pronostici for the very first time.
Fabrizio Bònoli presents Novara and the milieu in which he lived.
Giuseppe Bezza analyses the astrological contents of the Pronostici in the context of the knowledge of the era.
Salvo De Meis examines the astronomical phenomena mentioned by Novara, particularly because of his accuracy with respect to coeval astronomers.
Cinzia Colavita and Fabrizio Bònoli have transcribed the original texts of the Pronostici
Characterization of fungicide sensitivity profiles of Botrytis cinerea populations sampled in Lombardy (Northern Italy) and implications for resistance management
No full textBACKGROUND:
Resistance to fungicides is one of the aspects that must be considered when planning treatments to achieve an optimal control of grey mold, caused by Botrytis cinerea, in vineyards. In this study, extensive fungicide resistance monitoring was carried out in Northern Italy (Lombardy region) to evaluate several aspects of fungicide resistance (frequency of resistance, effect of field treatments, mechanism of resistance and fitness) on 720 B. cinerea strains isolated from 36 vineyards.
RESULTS:
Of the characterized strains, 12% were resistant to a single fungicide class (3% to the succinate dehydrogenase inhibitor boscalid, 4% to the anilinopirimidine cyprodinil; 5% to the phenylpirrole fludioxonil; 0.1% to the ketoreductase inhibitor fenhexamid) and 0.8% to two fungicide classes contemporaneously. Resistance was associated with mutations reported in the literature for boscalid (H272Y/R) and fenhexamid (P238S or I232M). Two new mutations in sdhC (A187F) and in sdhD (I189L) could be related to boscalid resistance. Strains resistant to fludioxonil did not show any known mutations. No significant differences were found in the fitness of sensitive and resistant strains.
CONCLUSION:
Overall, field populations of B. cinerea showed a relatively low frequency of resistance, but the geographical distribution of resistance, genetic mechanisms of resistance and fitness of resistant strains suggest that management of resistance should be implemented, at local and regional levels. Particular attention should be given to the fungicide sprays planned before veraison, since they seem to be associated with a higher frequency of resistant strains in vineyards
The submorphemic structure of Amharic: toward a phonosemantic analysis
No full textSince the emergence of structural linguistics most of the linguistic studies have been conducted with the declared assumption that there is no systematic relationship between sound and meaning until a certain number of sounds are combined and arbitrarily associated with certain meanings to form the basic meaningful units known as morphemes. The pervasiveness and success of this paradigm over the decades has apparently discouraged the search for potential sound-meaning relation below the morpheme presumably because such an association is difficult to establish empirically.
This study represents an attempt to explore and address this nexus based on one African language: Amharic. It addresses the systematic correspondence between sound and meaning that is observable in the Amharic language’s lexicon across varieties of roots, which are generally believed to be the basic meaningful units. Contrary to the fundamental assumption that restricts sound-meaning association to the morphemic level, the study shows that roots in the Amharic language exhibit phonetic and semantic relationship with one another. This fact suggests the existence of lower level phonetic and semantic structure that has not been recognized as meaningful, and thus substantiates similar sub-morphemic sound meaning correspondences that have been observed in various languages of the world, including the phonaesthemic analyses of English and other Indo-European languages.
The initial phase of investigation on a comprehensive database of Amharic roots extracted from Kane’s (1991) Amharic-English dictionary confirmed that there is a systematic sound-meaning correspondence between roots that share subsets of their consonants to such extent that the shared semantic properties of the roots can be abstracted as the semantic descriptions of the common sub-morphemic pairs and single consonants. The study was followed by a sound-meaning matching experiment with native speakers based on a series of constructed non-sense words/ roots and the abstracted semantic descriptions of the individual consonants. The findings showed the same results as the initial phase thus confirming those findings:
a. The cross-root semantic relations indicate correspondence in phonetic form and in semantic association between the shared components of the roots.
b. The core meaning of a root can be described as the composition of the associated semantic properties of its consonants.
Statistical analysis of the results of the experiment confirmed that the observed sound-meaning correspondences are not mere coincidences, but systematic relationships that occur at the sub-morphemic level.
To the extent that the statical analyses are correct, this finding is argued to be an important contribution to linguistic theory in general with respect to the redefinition of what constitutes the basic unit of meaning in natural language. It is suggested that form-meaning association in language trickles down to the phoneme level.
Further, with respect to Amharic and potentially other Semitic languages, the finding in this study has necessitated the dichotomization of the concept of root and etymon which is defined as the phonetic and semantic base of related stems. It is argued that this distinction is vital in understanding the morpho-semantic characteristics that occur in Amharic and related languages, and in accounting for certain diachronic phenomena in the language. The practical and theoretical implications of these findings are examined in the study.Item withdrawn by Mark Zulauf ([email protected]) on 2013-07-12T20:54:13Z
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Removal of phosphate from contaminated water using activated carbon supported nanoscale zero-valent iron (nZVI) particles
No full textIn the current study activated carbon supported zero-valent iron nanoparticles were synthesised,
characterized and used for phosphate adsorption study. Batch adsorption experiments were carried out to
study the effect of activated carbon supported nZVI nanocomposites on the removal of phosphorus (P) from
50 mg/L P contaminated water at various pH values. When the activated carbon supported nZVI dosage
increased from 2 g/L to 8 g/L the percentage P adsorbed increased from 69 % to 99.5%. The amount of P
adsorbed increased with an increasing concentration of activated carbon supported nZVI dosage and
decreasing pH values. Increasing adsorption of P with increasing adsorbent dosage can be due to higher
adsorption site, however at higher adsorption dosages beyond 8 g/L the adsorption showed a decreasing
trend due to the saturation and overlapping of adsorption sites. When the pH value of the solution increased
from 3 to 11 the percentage removal of P decreased from 99.5 to 12 %. The reduction in adsorption at
increasing pH values can be attributed to the repulsion between hydroxylic ions (OH¯
) on the surface of iron
nanoparticles and the existence of P in the form of phosphate anions (H2PO4¯, HPO4¯and PO4
3¯ ). Langmuir
and Freundlich adsorption models were fitted in the experimental data, and it was found that the Langmuir
model fitted well, and the calculated maximum adsorption capacity of phosphate was 68 mg/g, suggesting
significantly higher and remarkable uptake of phosphate by activated carbon supported nZVI particles. The
findings of this study showed that silica coated ZVI Particles could be promising adsorbents for removal of
phosphates from polluted water bodies effectively.https://www.cetjournal.it/index.php/cetpm2021Chemical Engineerin
G. BEZZA, Arcana Mundi. Antologia del pensiero astrologico antico, 2 voll., Rizzoli, Milano 1995, 1148 pp.,
No full textJosé Angel Valente a quattro mani. I frammenti verso la lingua.
No full textNell'articolo viene preso in esame il ruolo della traduzione e dell'anonimato nel libro di José Ángel Valente "Fragmentos de un libro futuro", Barcelona, Galaxia Gutemberg-Círculo de Lectores, 2000
Removal of chromium (VI) ions from polluted water using kaolinite-supported Fe/Al oxide(hydroxide) composite nanoadsorbents
No full textHexavalent chromium (Cr (VI)) contamination of surface and groundwater has become a major environmental
concern owing to the diverse applications of Cr(VI)) in several industries. In the current study kaolinite-supported
and size-controlled Fe/Al oxide(oxyhydroxide) nanocomposites (Kaolinite@Fe/Al nanocomposites) were
synthesized for efficient removal of Cr(VI) from aqueous solution. Scanning Electron Microscopy (SEM) and
Transmission Electron Microscopy (TEM) analysis of the nanocomposites revealed that the nanocomposites
were uniformly dispersed, with an average particle size of ~ 25 nm. Batch adsorption studies were carried out
to study the effect of (Kaolinite@Fe/Al nanocomposites) on the removal of chromium (VI) from 100 mg/L Cr(VI)
contaminated water over a wide pH range (3–10) at various adsorbent dosages. The result demonstrated that
the nanocomposites’ adsorption efficiency increased with increasing adsorbent dosage. When the
Kaolinite@Fe/Al nanocomposites dosage was increased from 1.0 to 3.0 g/L, the Cr(VI) removal percentage
increased from 65.4 % to ∼99.0 %. This is due to the greater surface area and availability of more adsorption
sites at higher dosages of the adsorbent. There was a significant removal of Cr(VI) in the pH range 3–6 reaching
up to 99.0% Cr(VI) removal, however, removal efficiency decreased drastically beyond pH 6. Chromium (VI)
exists as CrO4
2−, HCrO4
− and Cr2O7
2− oxyanionic species while the surface of the adsorbent becomes highly
protonated, owing to the variable surface charge imparted by Al/Fe oxides/hydroxides favouring remarkable
uptake of Cr(VI) in the anionic form. The experimental data fitted Langmuir adsorption model well with a
maximum adsorption capacity of 70.71 mg/g. The results of the study demonstrate that Kaolinite@Fe/Al
nanocomposites may have a promising potential for remediation of Cr(VI) contaminated wastewater and
industrial effluents.The Water Research Commission (WRC) grant for externally funded Postdoctoral Fellowship and the National Research Foundation (NRF) of South Africa.http://www.aidic.it/cetam2023Chemical Engineerin
Adsorption of As (III) from contaminated water on activated carbon-supported nanoscale zero-valent iron particles
No full textArsenic (As) contamination is a major concern due to its toxicity and tendency to accumulate and bio-magnify
within the food chain, causing wider damage to the ecosystem. In the current study, activated carbon-supported
nanoscale zerovalent iron (AC-nZVI) particles, were produced using chemical reduction of ferric chloride
hexahydrate in the presence of activated carbon as a scaffold to avoid agglomeration and improve their
dispersity. Detailed transmission electron microscopy (TEM), and scanning electron microscopy (SEM)
characterization of the as-synthesized nanoparticles showed monodispersed nanoparticles of approximate size
45 ±10 nm. Their potential application for removal of As(III) from contaminated water was investigated in batch
adsorption experiments at various adsorbent dosages and pH values. The results of the study demonstrated
that AC-nZVI particles exhibited 82.5% removal of As (III) ions (initial concentration 100 mg/L) at an adsorbent
dosage of 2 g/L. The adsorption performance increased with increasing adsorbent dosage and removed 99%
As(III) at an adsorbent dosage of 5g/L. The Langmuir and Freundlich adsorption models were fitted to the
experimental data, and it was found that the Langmuir isotherm fitted the data better than the Freundlich
isotherm with a maximum adsorption capacity of 27.83 mg/g of adsorbent. In the current study As(III) exists
predominately as uncharged species H3AsO30 under the designed pH range of 4-8, therefore the effects of
solution pH on As (III) adsorption were hardly observed. The results of the study demonstrated that activated
carbon-supported zerovalent iron particles can have tremendous potential application for the effective removal
of As(III) from industrial wastewaters.http://www.aidic.it/cetam2023Chemical Engineerin
Electrode Materials Based on Phosphates for Lithium Ion Batteries as an Efficient Energy Storage System
No full textCo0.5TiOPO4 and LiFe0.4Mn0.6PO4 phosphates present the electrochemical features of anode and cathode of lithium ion batteries, respectively. The cobalt oxyphosphate exhibits a high capacity and a working potential around 1.5 V. During the first discharge, an irreversible lithiation reaction occurs while during the subsequent cycles, a good reversibility of the charge/discharge process was obtained with a stable specific capacity approaching 280 mAh/g even at high rate. For the LiFe0.4Mn0.6PO4 olivine, the electrochemical process occurs in two steps involving separately two redox couples: Mn3+/Mn2+ and Fe3+/Fe2+. The electrochemical lithiation/delithiation occur without significant changes in the structure. Even if the obtained capacity ( 110 mAh/g), is lower that the theoretical one, the coulombic storage efficiency is rather good ( 95%).</p
Recensiones [Revista de Historia Económica Año X Otoño 1992 n. 3 pp. 519-548]
No full textEditada en la Universidad Carlos IIIFranco Amatori y Bruno Bezza. Montecatini 1888-1966. Capitoli di storia di una grande impresa. (Por Núria Puig).-- Dudley Baines. Emigration from Europe, 1815-1930. (Por Blanca Sánchez Alonso).-- Roderick Floud, Kenneth Wachter y Annabel Gregory. Height, Health and History. Nutritional Status in the United Kingdom, 1750-1980. (Por José Miguel Martínez Carrión).-- G. Goertz. The World Chemical Industry around 1910: a Comparative Analysis by Branch and Country. (Por Núria Puig).-- José Luis García Delgado, ed.. Las ciudades en la modernización de España. Los decenios interseculares. VIII Coloquio de Historia Contemporánea de España dirigido por Manuel Tuñón de Lara. (Por Luis Garrido González).-- Charles P. Kindleberger. Manias, Panics and Crashes. A History of Financial Crisis. (Por J. Ignacio Peña).-- Carlos Alberto Mayo. Los Betlemitas en Buenos Aires: Convento, Economía y Sociedad (1748-1822). (Por Carlos Newland).-- Hilda Sábato. Agrarian Capitalism and the World Market: Buenos Aires in the Pastoral Age, 1840-1890. (Por Julio E. Revilla).-- Gabriel Tortella, ed.. Educación y Desarrollo Económico desde la Revolución Industrial. (Por Cecilia Albert)Publicad
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